Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562346
A. Elsaadawi, A. Kalas, M. Fawzi
Power electronic systems are considered as one of the most important components in many applications, such as nuclear reactors, aerospace, military applications and life saving machines. In such applications the system should be high reliable, a knowledge-based expert system was developed to diagnose faults in a three phase induction motor system . A software tool called KAPPA PC 2.1 was used to develop the expert system, the system is modeled in MATLAB SIMULINK and the simulation results at normal and fault conditions was rewritten as a set of if-then rules by which the expert system can discriminate the fault.
电力电子系统被认为是许多应用中最重要的部件之一，例如核反应堆，航空航天，军事应用和救生机器。为了满足三相异步电动机系统高可靠性的要求，设计了一种基于知识的故障诊断专家系统。采用KAPPA PC 2.1软件开发专家系统，在MATLAB SIMULINK中对系统进行建模，并将正常和故障情况下的仿真结果改写为一组if-then规则，使专家系统能够识别故障。
{"title":"Development of an expert system to fault diagnosis of three phase induction motor drive system","authors":"A. Elsaadawi, A. Kalas, M. Fawzi","doi":"10.1109/MEPCON.2008.4562346","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562346","url":null,"abstract":"Power electronic systems are considered as one of the most important components in many applications, such as nuclear reactors, aerospace, military applications and life saving machines. In such applications the system should be high reliable, a knowledge-based expert system was developed to diagnose faults in a three phase induction motor system . A software tool called KAPPA PC 2.1 was used to develop the expert system, the system is modeled in MATLAB SIMULINK and the simulation results at normal and fault conditions was rewritten as a set of if-then rules by which the expert system can discriminate the fault.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114976880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562341
A. Ghany
In this paper, a mixed H2/Hinfin control theory and simulated annealing (SA) techniques in conjunction with adaptive neuro-fuzzy inference system (ANFIS) are combined to design two adaptively robust output feedback controllers. The first controller is a mixed H2/Hinfin that is solved using linear matrix inequalities (LMI) technique. The second one, robust PID, which is ideally practical for industry, whose optimum parameters are found using the optimization of mixed H2/Hinfin norms via SA. Canceling pole operation is used to perform the calculations of mixed H2/Hinfin norms. The former is characterized by a similar size as the plant that may be of higher order and thus creates difficulty in implementation in large systems. The latter is shown to be robust and more appealing from an implementation point of view since its size is lower. Two ANFISs are designed. The first ANFIS system (ANFISS), is used to predict the system parameters. The second ANFIS control (ANFISC) , is used to append the corresponding optimized control setting of the PID gains. The operating conditions represent the inputs of each ANFIS defined by the generator active power output, and terminal voltage. Both controllers are used as a power system stabilizer for a single-machine infinite bus system. The proposed controllers show robustness over a wide range of operating conditions and parameters change.
{"title":"Design of a mixed H2/H∞ robust PID power system stabilizer with fuzzy adaptation and Simulated Annealing optimization","authors":"A. Ghany","doi":"10.1109/MEPCON.2008.4562341","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562341","url":null,"abstract":"In this paper, a mixed H2/Hinfin control theory and simulated annealing (SA) techniques in conjunction with adaptive neuro-fuzzy inference system (ANFIS) are combined to design two adaptively robust output feedback controllers. The first controller is a mixed H2/Hinfin that is solved using linear matrix inequalities (LMI) technique. The second one, robust PID, which is ideally practical for industry, whose optimum parameters are found using the optimization of mixed H2/Hinfin norms via SA. Canceling pole operation is used to perform the calculations of mixed H2/Hinfin norms. The former is characterized by a similar size as the plant that may be of higher order and thus creates difficulty in implementation in large systems. The latter is shown to be robust and more appealing from an implementation point of view since its size is lower. Two ANFISs are designed. The first ANFIS system (ANFISS), is used to predict the system parameters. The second ANFIS control (ANFISC) , is used to append the corresponding optimized control setting of the PID gains. The operating conditions represent the inputs of each ANFIS defined by the generator active power output, and terminal voltage. Both controllers are used as a power system stabilizer for a single-machine infinite bus system. The proposed controllers show robustness over a wide range of operating conditions and parameters change.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123039733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562299
T. Lei, Xiao-bin Zhang, Yang Dong, Jingjing Zhao, Hui Lin
The object of this paper is to present further study of three-phase rectifiers based on one-cycle control in aircraft electric power system. The fundamental vector principle of one cycle control is introduced and analyzed briefly. The Simulated model of three-phase Rectifiers based on one-cycle control is build by software Saber. The 4 kW prototype of three-phase rectifiers based on the one-cycle control is presented. An investigation of steady and dynamic performance for three-phase PFC system has been carried out in aircraft electric power system conditions. The result of simulation and experiments demonstrate that one-cycle controller features excellent performance, simple circuitry, and low cost control methods for three-phase rectifiers in aircraft electric power systems.
{"title":"Study of high power factor rectifiers based on one cycle control in aircraft electric power system","authors":"T. Lei, Xiao-bin Zhang, Yang Dong, Jingjing Zhao, Hui Lin","doi":"10.1109/MEPCON.2008.4562299","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562299","url":null,"abstract":"The object of this paper is to present further study of three-phase rectifiers based on one-cycle control in aircraft electric power system. The fundamental vector principle of one cycle control is introduced and analyzed briefly. The Simulated model of three-phase Rectifiers based on one-cycle control is build by software Saber. The 4 kW prototype of three-phase rectifiers based on the one-cycle control is presented. An investigation of steady and dynamic performance for three-phase PFC system has been carried out in aircraft electric power system conditions. The result of simulation and experiments demonstrate that one-cycle controller features excellent performance, simple circuitry, and low cost control methods for three-phase rectifiers in aircraft electric power systems.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123172284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562375
A. Ghorbani, S. Pourmohammad, M. Ghazizadeh
Changing the reference signal of the excitation and AVR systems is one of the excitation control methods in controlling the terminal voltage of the generator and reactive power. In most cases the aforementioned method results in transient oscillations in the output voltage of the generator that must be damped as quickly as possible. This paper offers a Posicast controller for damping the oscillations caused by changing the reference signal of the excitation system. Extensive time domain simulations and a performance index are used to validate the performance of the proposed controller. To evaluate the robustness of the designed controller, impacts of change in the operating conditions and the use of an inaccurate model of the process in the controller design stage, on performance of the proposed controller are also investigated.
{"title":"Mitigation of oscillations due to changing the reference signal of the excitation system using a Posicast controller","authors":"A. Ghorbani, S. Pourmohammad, M. Ghazizadeh","doi":"10.1109/MEPCON.2008.4562375","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562375","url":null,"abstract":"Changing the reference signal of the excitation and AVR systems is one of the excitation control methods in controlling the terminal voltage of the generator and reactive power. In most cases the aforementioned method results in transient oscillations in the output voltage of the generator that must be damped as quickly as possible. This paper offers a Posicast controller for damping the oscillations caused by changing the reference signal of the excitation system. Extensive time domain simulations and a performance index are used to validate the performance of the proposed controller. To evaluate the robustness of the designed controller, impacts of change in the operating conditions and the use of an inaccurate model of the process in the controller design stage, on performance of the proposed controller are also investigated.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117272203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562306
C. Ferreira, F. Barbosa, C. Agreira
This paper presents a transient stability preventive control technique based on a hybrid method. In order to maintain the power system security it is evaluated the generators output power that should be shift from the most unstable synchronous machines to the undisturbed units. The reallocation of the generators output power is carried out using an optimal power flow program. The hybrid method is a very important tool for the transient stability analysis, since it allows a fast evaluation of the stability limits and margins. This approach can also easily accommodate detailed models of the network devices and protective schemes. In order to validate the established mathematical models it was studied the transient stability of the New England test power network. The results obtained with the proposed methodology were compared with the solutions produced by another numerical formulation, showing a very close agreement.
{"title":"Transient stability preventive control of an electric power system using a hybrid method","authors":"C. Ferreira, F. Barbosa, C. Agreira","doi":"10.1109/MEPCON.2008.4562306","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562306","url":null,"abstract":"This paper presents a transient stability preventive control technique based on a hybrid method. In order to maintain the power system security it is evaluated the generators output power that should be shift from the most unstable synchronous machines to the undisturbed units. The reallocation of the generators output power is carried out using an optimal power flow program. The hybrid method is a very important tool for the transient stability analysis, since it allows a fast evaluation of the stability limits and margins. This approach can also easily accommodate detailed models of the network devices and protective schemes. In order to validate the established mathematical models it was studied the transient stability of the New England test power network. The results obtained with the proposed methodology were compared with the solutions produced by another numerical formulation, showing a very close agreement.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121257679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562301
A. Abu-Siada, Syed Islam
This paper discusses application of superconducting magnetic energy storage (SMES) unit to improve power system performance. The application of SMES unit in mitigating voltage sags and in damping dynamic oscillations in power systems is discussed. To show the effectiveness of the proposed controller in providing continuous voltage regulation and in enhancing power system dynamics, a three-phase short circuit is applied to the system and simulation is carried out with and with no SMES connected to the system. The results of these investigations are studied using the well-developed graphic facilities available in an industry standard power system package, namely PSCAD/EMTDC. Results have shown that SMES unit can effectively improve system stability and power quality of power systems.
{"title":"Superconducting Magnetic Energy Storage unit, an efficient energy technology for power systems","authors":"A. Abu-Siada, Syed Islam","doi":"10.1109/MEPCON.2008.4562301","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562301","url":null,"abstract":"This paper discusses application of superconducting magnetic energy storage (SMES) unit to improve power system performance. The application of SMES unit in mitigating voltage sags and in damping dynamic oscillations in power systems is discussed. To show the effectiveness of the proposed controller in providing continuous voltage regulation and in enhancing power system dynamics, a three-phase short circuit is applied to the system and simulation is carried out with and with no SMES connected to the system. The results of these investigations are studied using the well-developed graphic facilities available in an industry standard power system package, namely PSCAD/EMTDC. Results have shown that SMES unit can effectively improve system stability and power quality of power systems.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125298841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562393
A. Makky, H. Abo-Zied, F. N. Abdelbar
The aim of this work is to develop a modular converter system for induction heating application, which considerably reduces the expenditure, while covering the whole range of power at high frequency (400 KHz). Such a system shall consist of identical converter-modules, which are combined to produce the desired power. To increase the power, parallel connection of modules was employed. At high power high frequency, the IGBT losses are very important and the IGBT losses are totally dominated by the turn-off losses. The maximum output power rating of the inverter is manly limited by the IGBT losses. For parallel operation of IGBTs modules, which used to increase the output power, there are two ways used to distressing of IGBTs, normal parallel operation method and cycle control parallel operation method. This paper presents the influence of these two different methods which used for IGBTs modules operate at 400 KHz and 100 KW for one bridge on the maximum output power.
{"title":"Parallel operation of IGBTs modular converter system for high power high frequency induction heating applications","authors":"A. Makky, H. Abo-Zied, F. N. Abdelbar","doi":"10.1109/MEPCON.2008.4562393","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562393","url":null,"abstract":"The aim of this work is to develop a modular converter system for induction heating application, which considerably reduces the expenditure, while covering the whole range of power at high frequency (400 KHz). Such a system shall consist of identical converter-modules, which are combined to produce the desired power. To increase the power, parallel connection of modules was employed. At high power high frequency, the IGBT losses are very important and the IGBT losses are totally dominated by the turn-off losses. The maximum output power rating of the inverter is manly limited by the IGBT losses. For parallel operation of IGBTs modules, which used to increase the output power, there are two ways used to distressing of IGBTs, normal parallel operation method and cycle control parallel operation method. This paper presents the influence of these two different methods which used for IGBTs modules operate at 400 KHz and 100 KW for one bridge on the maximum output power.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124666124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562384
M. Abdel-Akher, M.E. Ahmad, R. Mahanty, K. M. Nor
This paper investigates the relationship between the multiple power-flow solutions and the voltage stability of unbalanced networks. An analysis of an unbalanced two bus network shows that a pair of solutions for the voltage at the neutral point exists at the neutral node. This is two pair of solutions for the terminal voltages at the load bus. One of the interesting findings is that two possible nose curves or PV curves can be constructed for each phase. Each of these curves is a combination of the multiple solutions. Simulation studies have been carried out for the multiple solutions using two-bus network model. Firstly, a constant impedance load model has been utilized to calculate the solution associated with the voltage stability of the study system. Then, its equivalent complex power load is used to calculate the multiple power-flow solutions. The results show that there is a unique point which is directly proportional to the imbalance in the power demand at the load bus. This point is the key to construct the two PV curves. It is used to set a criterion to differentiate between the two PV curves and hence to find out the PV curve related to the voltage stability problem.
{"title":"On the relationship between multiple power-flow solutions and the voltage stability problem in unbalanced three-phase networks","authors":"M. Abdel-Akher, M.E. Ahmad, R. Mahanty, K. M. Nor","doi":"10.1109/MEPCON.2008.4562384","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562384","url":null,"abstract":"This paper investigates the relationship between the multiple power-flow solutions and the voltage stability of unbalanced networks. An analysis of an unbalanced two bus network shows that a pair of solutions for the voltage at the neutral point exists at the neutral node. This is two pair of solutions for the terminal voltages at the load bus. One of the interesting findings is that two possible nose curves or PV curves can be constructed for each phase. Each of these curves is a combination of the multiple solutions. Simulation studies have been carried out for the multiple solutions using two-bus network model. Firstly, a constant impedance load model has been utilized to calculate the solution associated with the voltage stability of the study system. Then, its equivalent complex power load is used to calculate the multiple power-flow solutions. The results show that there is a unique point which is directly proportional to the imbalance in the power demand at the load bus. This point is the key to construct the two PV curves. It is used to set a criterion to differentiate between the two PV curves and hence to find out the PV curve related to the voltage stability problem.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123885544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562312
M. Moussa, Y. Gaber, M. El Attar
Permanent Magnet Synchronous Motors (PMSMs) are receiving increased attention for drive applications because of their high toque to inertia ratio, superior power density, and high efficiency. To control PMSM, position and speed sensors are indispensable because the current should be controlled depending on the rotor position. However, these sensors are undesirable from standpoints of size, cost, maintenance, and reliability. There are different ways of approaching this problem, depending on the flux distribution. This paper presents a novel vector control for a permanent motor drive without use of a shaft sensor. The vector control drive provides a wide range of speeds, high torque capability and high efficiency. Two line-to-line voltages and two stator currents are sensed to produce the stator flux linkage space vector. The angle of this vector is then used to produce the appropriate stator current command signals which can be controlled to maintain zero d-axis current which is the condition of vector control, over a wide range of torque and speed. A speed signals is derived from the rate of change of angle of the flux linkage. Simulation is carried out in order to evaluate the behavior of the proposed method for different operating situations. The simulation results demonstrate that a good steady-state and transient performances for the proposed sensorless scheme are obtained.
{"title":"Vector control drive of permanent magnet motor without a shaft encoder","authors":"M. Moussa, Y. Gaber, M. El Attar","doi":"10.1109/MEPCON.2008.4562312","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562312","url":null,"abstract":"Permanent Magnet Synchronous Motors (PMSMs) are receiving increased attention for drive applications because of their high toque to inertia ratio, superior power density, and high efficiency. To control PMSM, position and speed sensors are indispensable because the current should be controlled depending on the rotor position. However, these sensors are undesirable from standpoints of size, cost, maintenance, and reliability. There are different ways of approaching this problem, depending on the flux distribution. This paper presents a novel vector control for a permanent motor drive without use of a shaft sensor. The vector control drive provides a wide range of speeds, high torque capability and high efficiency. Two line-to-line voltages and two stator currents are sensed to produce the stator flux linkage space vector. The angle of this vector is then used to produce the appropriate stator current command signals which can be controlled to maintain zero d-axis current which is the condition of vector control, over a wide range of torque and speed. A speed signals is derived from the rate of change of angle of the flux linkage. Simulation is carried out in order to evaluate the behavior of the proposed method for different operating situations. The simulation results demonstrate that a good steady-state and transient performances for the proposed sensorless scheme are obtained.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123989205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2008-03-12DOI: 10.1109/MEPCON.2008.4562343
A. Makky, H. Abo-Zied, F. N. Abdelbar, P. Mutschler
Current transformers fall into a general category known as instrument transformers. The instrument current transformer safely isolates measurement and control circuitry from the high voltage typically present on the circuit being measured. The instrument current transformer can be used as very important part of the closed loop for control circuit in high power high frequency induction heating applications. Design of an instrument current transformers having a high rating of primary current and high rating of frequency is a challenging process. Normally one can get an instrument current transformers having high current or high frequency. This problem ocurs due to the physical configuration of the core. Traditionally, at high frequency shunt resistance can be used to get a signal from the primary current. This method facing many problems. For this work, our approch is to design and implementation of high frequency instrument current transformer, the primary current up to 200 A and 400 KHz. The experimental results which obtained from the presented design shows a good agreement with the theoretical results.
{"title":"Design of the instrument current transformer for high frequency high power applications","authors":"A. Makky, H. Abo-Zied, F. N. Abdelbar, P. Mutschler","doi":"10.1109/MEPCON.2008.4562343","DOIUrl":"https://doi.org/10.1109/MEPCON.2008.4562343","url":null,"abstract":"Current transformers fall into a general category known as instrument transformers. The instrument current transformer safely isolates measurement and control circuitry from the high voltage typically present on the circuit being measured. The instrument current transformer can be used as very important part of the closed loop for control circuit in high power high frequency induction heating applications. Design of an instrument current transformers having a high rating of primary current and high rating of frequency is a challenging process. Normally one can get an instrument current transformers having high current or high frequency. This problem ocurs due to the physical configuration of the core. Traditionally, at high frequency shunt resistance can be used to get a signal from the primary current. This method facing many problems. For this work, our approch is to design and implementation of high frequency instrument current transformer, the primary current up to 200 A and 400 KHz. The experimental results which obtained from the presented design shows a good agreement with the theoretical results.","PeriodicalId":236620,"journal":{"name":"2008 12th International Middle-East Power System Conference","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114353448","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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